Bhāṣya
यदज्ञानादभूद्द्वैतं ज्ञाते यस्मिन्निवर्तते ।रज्जुसर्पवदत्यन्तं तं वन्दे पुरुषोत्तमम् ॥
In plain words
Not knowing him, duality came into being. Know him, and it ends completely — the way the snake ends when you see the rope. To that Supreme Person I bow.
Close to the Sanskrit
That, from ignorance of which duality came to be, and in whom, when he is known, it ceases utterly, as with the rope and the snake — to him, the Supreme Person, I bow.